Bon Appétit spends a day on the line with Pat LaFrieda, head butcher at Pat LaFrieda Meat Purveyors. Supplying meat to the most notable restaurants and hotels for over a century, Pat LaFrieda processes hundreds of thousands of pounds of meat a day and is home to the world’s largest dry-aging room. Take a look inside their operation and see what it takes to become America’s most celebrated butcher facility.